en la cocina economica siempre sabroso las cocineras anotaron en el pizarron la cantidad de queso que se empleo durante el dia

You move the constant to the right side and change its sign to be 9z= -6 -8. that’s the first step.the second step would be calculate the difference of -8-6 to get -14. you equation should now be 9z=-14the last step is to divide both sides by 9 to get z=-14/9hope this